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- EMDB-2854: CryoEM structure of dynactin complex at 6.3 angstrom resolution -

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Basic information

Entry
Database: EMDB / ID: EMD-2854
TitleCryoEM structure of dynactin complex at 6.3 angstrom resolution
Map dataCryoEM reconstruction of dynactin complex from pig brain at 6.3 angstrom resolution.
Sample
  • Sample: Dynactin complex from pig brainDynactin
  • Protein or peptide: Arp1
Keywordsdynactin / dynein co-factor / actin-like filament / cellular cargo transport
Biological speciesSus scrofa domesticus (domestic pig)
Methodsingle particle reconstruction / cryo EM / Resolution: 6.3 Å
AuthorsZhang K / Urnavicius L / Diamant AG / Motz C / Schlager MA / Yu M / Patel NA / Robinson CV / Carter AP
CitationJournal: Science / Year: 2015
Title: The structure of the dynactin complex and its interaction with dynein.
Authors: Linas Urnavicius / Kai Zhang / Aristides G Diamant / Carina Motz / Max A Schlager / Minmin Yu / Nisha A Patel / Carol V Robinson / Andrew P Carter /
Abstract: Dynactin is an essential cofactor for the microtubule motor cytoplasmic dynein-1. We report the structure of the 23-subunit dynactin complex by cryo-electron microscopy to 4.0 angstroms. Our ...Dynactin is an essential cofactor for the microtubule motor cytoplasmic dynein-1. We report the structure of the 23-subunit dynactin complex by cryo-electron microscopy to 4.0 angstroms. Our reconstruction reveals how dynactin is built around a filament containing eight copies of the actin-related protein Arp1 and one of β-actin. The filament is capped at each end by distinct protein complexes, and its length is defined by elongated peptides that emerge from the α-helical shoulder domain. A further 8.2 angstrom structure of the complex between dynein, dynactin, and the motility-inducing cargo adaptor Bicaudal-D2 shows how the translational symmetry of the dynein tail matches that of the dynactin filament. The Bicaudal-D2 coiled coil runs between dynein and dynactin to stabilize the mutually dependent interactions between all three components.
History
DepositionJan 21, 2015-
Header (metadata) releaseMar 4, 2015-
Map releaseMar 4, 2015-
UpdateApr 15, 2015-
Current statusApr 15, 2015Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.108
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.108
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

image2854.png

Downloads & links

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Map

FileDownload / File: emd_2854.map.gz / Format: CCP4 / Size: 173.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryoEM reconstruction of dynactin complex from pig brain at 6.3 angstrom resolution.
Voxel sizeX=Y=Z: 1.7 Å
Density
Contour LevelBy AUTHOR: 0.108 / Movie #1: 0.108
Minimum - Maximum-0.24803165 - 0.57060814
Average (Standard dev.)0.00067001 (±0.0108156)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-180-180-180
Dimensions360360360
Spacing360360360
CellA=B=C: 612.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.71.71.7
M x/y/z360360360
origin x/y/z0.0000.0000.000
length x/y/z612.000612.000612.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS-180-180-180
NC/NR/NS360360360
D min/max/mean-0.2480.5710.001

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Supplemental data

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Sample components

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Entire : Dynactin complex from pig brain

EntireName: Dynactin complex from pig brainDynactin
Components
  • Sample: Dynactin complex from pig brainDynactin
  • Protein or peptide: Arp1

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Supramolecule #1000: Dynactin complex from pig brain

SupramoleculeName: Dynactin complex from pig brain / type: sample / ID: 1000
Details: The sample was stored in -80 degrees Celcius freezer before being loaded onto the grid.
Oligomeric state: One dynactin complex / Number unique components: 1
Molecular weightExperimental: 1.06 MDa / Theoretical: 1.06 MDa / Method: Mass spectrometry

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Macromolecule #1: Arp1

MacromoleculeName: Arp1 / type: protein_or_peptide / ID: 1 / Number of copies: 8 / Oligomeric state: Octamer / Recombinant expression: No
Source (natural)Organism: Sus scrofa domesticus (domestic pig) / synonym: pig / Tissue: Brain / Location in cell: cytoplasm
Molecular weightExperimental: 43 KDa / Theoretical: 43 KDa

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.07 mg/mL
BufferpH: 6.5
Details: 50 mM KCl, 5 mM DDT, 0.1 mM Mg-ATP, 1 mM MgCl2 and 25 mM KH2PO4-K2HPO4
GridDetails: R2/2 400-square-mesh copper grids with thin carbon support
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 105 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 7.0 µm / Nominal defocus min: 2.0 µm / Nominal magnification: 47000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
TemperatureMin: 80 K / Max: 100 K
Alignment procedureLegacy - Astigmatism: Objective lens astigmatism was corrected at 96,000 times magnification
DateApr 4, 2014
Image recordingCategory: CCD / Film or detector model: FEI FALCON II (4k x 4k) / Number real images: 4483 / Average electron dose: 51 e/Å2 / Details: 51 frames per movie / Bits/pixel: 32
Tilt angle min0
Tilt angle max0
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionDetails: Each particle by Gctf
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 6.3 Å / Resolution method: OTHER / Software - Name: Relion / Number images used: 80865
DetailsThe particles were selected using the GPU accelerated automatic selection program Gautomatch. The CTF parameter were determined and refined using a GPU accelerated program Gctf

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